72 lines
2 KiB
Python
72 lines
2 KiB
Python
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"""Linting for Python using Aspects."""
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# Hacked up from https://github.com/bazelbuild/rules_rust/blob/main/rust/private/clippy.bzl
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#
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# Usage:
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# bazel build --aspects="//tools/flake8:flake8.bzl%flake8_aspect" --output_groups=flake8_checks <target|pattern>
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#
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# Note that the build directive can be inserted to .bazelrc to make it part of the default behavior
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def _black_aspect_impl(target, ctx):
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if hasattr(ctx.rule.attr, 'srcs'):
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black = ctx.attr._black.files_to_run
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config = ctx.attr._config.files.to_list()[0]
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files = []
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for src in ctx.rule.attr.srcs:
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for f in src.files.to_list():
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if f.extension == "py":
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files.append(f)
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if files:
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report = ctx.actions.declare_file(ctx.label.name + ".black.report")
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else:
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return []
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args = ["--check", "--output-file", report.path]
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for f in files:
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args.append(f.path)
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ctx.actions.run(
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executable = black,
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inputs = files,
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tools = ctx.attr._config.files.to_list() + ctx.attr._black.files.to_list(),
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arguments = args,
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outputs = [report],
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mnemonic = "Black",
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)
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return [
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OutputGroupInfo(black_checks = depset([report]))
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]
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return []
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black_aspect = aspect(
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implementation = _black_aspect_impl,
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attr_aspects = ['deps'],
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attrs = {
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'_black': attr.label(default=":black"),
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'_config': attr.label(
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default="//:setup.cfg",
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executable=False,
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allow_single_file=True
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),
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}
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)
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def _black_rule_impl(ctx):
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ready_targets = [dep for dep in ctx.attr.deps if "black_checks" in dir(dep[OutputGroupInfo])]
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files = depset([], transitive = [dep[OutputGroupInfo].black_checks for dep in ready_targets])
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return [DefaultInfo(files = files)]
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black = rule(
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implementation = _black_rule_impl,
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attrs = {
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'deps' : attr.label_list(aspects = [black_aspect]),
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},
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)
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